[Sdcc-user] SDCC 2.2.1 and pointers??????

Hello all,

     I think I need a little bit of advice!! At the moment I am working 
on an AT-command interpreter. Mostly it does what it has to do (fortunately)
but when I try to do something special (saving the 'phonenumbers' from 
source and destination (it's a little bit different from the normal 
AT-commands)) it completely messes up!!

     I am working with a 80c152, a derivative from the 8051 with some 
extra communication hardware, which is currently not in use...

I have:

xdata unsigned char _xdata * source;
xdata unsigned char _xdata * dest;

At init, I do:

source = GetMem(12);    // dynamic memory allocation
dest = GetMem(30);      // works perfectly

but when using the program, there seem to be very weird things in these 
buffers...I get the commands in there and however source and dest are 
completely different, they are printed out twice when trying to look at the 
contents...

e.g.:

ATB1
OK

ATC?          --> give what's in source and dest
SRC  : C?
DEST : C?
OK            --> but not OK :-(

ATCON1DOA-0.   --> put ON1DOA-0 in source
OK

ATC?
SRC  : C?
DOA-0
DEST : C?
DOA-0
OK            --> absolutely NOT OK

ATDTON0BWP-0.  --> put ON0BWP-0. in dest
CONNECT

--> so he goes ONLINE, but when trying to print the contents of both source 
and 
dest, it gives me:

ON0BWP-0
ON0BWP-0

?????????????????????????????

Who can explain me this.

EXTRA: I have to compile with the --xstack option.
* when I do sdcc --model-large ATCOMMAND.c  it gives an *.ihx file of about 
13k, but which doesn't do a thing!!!
* when I do sdcc --model-large --xstack ATCOMMAND.c it gives an *.ihx file of 
about 18k, much larger but goes wrong when using the pointers...


Greetings,

      Jan

Jan Van Belle

E-mail:  Jan...@ad...
HAM-mail: on...@on...